首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   25023篇
  免费   211篇
  国内免费   11篇
教育   18136篇
科学研究   2865篇
各国文化   117篇
体育   1347篇
综合类   17篇
文化理论   537篇
信息传播   2226篇
  2022年   94篇
  2021年   136篇
  2020年   207篇
  2019年   283篇
  2018年   2556篇
  2017年   2487篇
  2016年   1959篇
  2015年   384篇
  2014年   477篇
  2013年   2282篇
  2012年   562篇
  2011年   1051篇
  2010年   1143篇
  2009年   693篇
  2008年   926篇
  2007年   1451篇
  2006年   334篇
  2005年   618篇
  2004年   706篇
  2003年   582篇
  2002年   364篇
  2001年   315篇
  2000年   357篇
  1999年   253篇
  1998年   139篇
  1997年   194篇
  1996年   176篇
  1995年   118篇
  1994年   131篇
  1993年   118篇
  1992年   197篇
  1991年   188篇
  1990年   215篇
  1989年   211篇
  1988年   182篇
  1987年   192篇
  1986年   172篇
  1985年   208篇
  1984年   151篇
  1983年   132篇
  1982年   124篇
  1981年   109篇
  1980年   112篇
  1979年   174篇
  1978年   131篇
  1977年   114篇
  1976年   90篇
  1975年   95篇
  1974年   94篇
  1973年   91篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
The expertise of colleagues and experience gained through professional organizations is an overlooked resource for adding value to reference service. Collegial networks must be nurtured. They deserve the support and investment of the institution.  相似文献   
82.
AAMC STAT is a new, weekly electronic newsletter produced by the American Association of Medical Colleges. It provides coverage of national news related to academic medicine. This article briefly reviews the electronic publication and gives directions for subscribing to AAMC STAT.  相似文献   
83.
84.
85.
86.
87.
88.
89.
The literature of medical librarianship of Nigeria is reviewed. The staff structure of Nigerian univeristy libraries and, in particular, of the medical libraries attached to them is restrictive, unprogressive, and unconducive to the development of medical librarianship in Nigeria. These medical libraries should cease to be administered and regarded as just unavoidable appendages of the main university libraries. They should be independent, full-fledged libraries of their own, recognixed as full academic departments of their respective colleges or faculties, with their heads being in no way inferior in status to other heads of academic departments.The granting of faculty status to Nigerian unviersity librarians should go the whole way and let the principle of multiple professorships be applied to the staff structure of unviersity libraries. Efforts are being made to effect bibliographic organization of Nigerian medical literature. A national library of medicine for Nigeria, however, humble its beginning, should be established.  相似文献   
90.
This paper describes the procedures used at the Library of the College of Physicians of Philadelphia to divide its ninety-year-old dictionary card catalog. The division was necessitated by overcrowding, obsolete subject headings, and lack of a complete authority list which resulted in like materials being scattered throughout the catalog under several headings. Two catalogs were created: the historical-biographical catalog, representing all works published before 1950 and all works of historical or biographical nature; and the current catalog, containing all works published from 1950 on, excepting historical or biographical materials. The 1950- catalog was further divided into name and subject catalogs, and the subject section was revised according to MeSH. The project was completed in about two years. As a result, searching time has been much reduced, and the library is able to take advantage of the annual revisions of MeSH to update the subject catalog.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号